DNA polymerases need a primer oligonucleotide (RNA or DNA) - their substrates are an existing 3'-OH group and a dNTP. The primase however is a typical RNA polymerase, capable of initiating polynucleotide synthesis de novo by positioning a complementary ribonucleoside 5'-triphosphate opposite its complementary DNA base.
Alison Schapker. Alison Schapker is an American television writer and producer. She is well known for her work on the ABC espionage series Alias and for the FOX science-fiction series Fringe.
Helen Schucman, Ph.D., was a clinical and research psychologist, who held the tenured position of Associate Professor of Medical Psychology at the College of Physicians and Surgeons at the Columbia-Presbyterian Medical Center in New York City.illiam Thetford, Ph.D., was a tenured Professor of Medical Psychology at Columbia University's College of Physicians and Surgeons, and Director of the Psychology Department at the Presbyterian Hospital in New York City for whom Dr. Schucman worked.